Treatment method of cyanogen-containing wastewater from gold concentrate roasting and smelting plant
A sewage treatment method and sewage technology, applied in the direction of combustion method, combustion type, incinerator, etc., can solve the problems of huge tailings storage site, large equipment investment, long treatment cycle, etc., achieve good sewage treatment effect and low operating cost , the effect of simple method
Inactive Publication Date: 2010-11-24
林向东
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Problems solved by technology
The natural degradation method is the most common method to treat cyanide-containing wastewater from gold mines. This method requires a huge tailings storage site, and the treatment cycle is long, which is easy to cause leakage and secondary pollution
These methods all have the problems of complex process, long process, large equipment investment and high processing cost.
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[0011] The treatment method of cyanide-containing sewage in the gold concentrate roasting and smelting plant is to use cyanide-containing sewage instead of cooling water, and spray it into the boiling roaster for combustion in the form of cooling water, so that cyanide will react with oxygen at a high temperature of 600-630 ° C. Reaction, the toxic cyanide is converted into non-toxic carbon dioxide and nitrogen, which is discharged with the acid-making tail gas. Carbon dioxide and nitrogen have no effect on the acid-making system, and no secondary pollution is formed, thus completing the treatment process. Concentrate the sewage containing cyanide into the storage tank, pump it into the fluidized roaster instead of cooling water, control the amount of injection through the valve, and the amount of injection is determined according to the temperature of the roaster.
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The invention relates to a treatment method of cyanogen-containing wastewater from a gold smelting plant, in particular to a treatment method of cyanogen-containing wastewater from a gold concentrate roasting and smelting plant. The method is characterized by replacing the cooling water for a fluidizing roaster with the cyanogen-containing wastewater, injecting the cyanogen-containing wastewater into the fluidizing roaster by way of cooling water to burn and allowing cyanide to react with oxygen under the high temperature of 600-630 DEG C to generate non-toxic carbon dioxide and nitrogen, thus completing treatment. The method has the following advantages: the spraying cooling water for the fluidizing roaster is changed into the cyanogen-containing wastewater, thus not only saving the water for production, but also treating the cyanide wastewater and realizing genuine harmless treatment, the method is simple and the wastewater treatment effect is good; the existing production equipment is used as the reaction vessel, without additional new investment; and the high temperature of the production system is used in the process of wastewater treatment, without adding any fuel, thus the operation cost is quite low, at the same time, the method has the advantages of high efficiency, easy operation, stable operation and the like and has good economic and social benefits.
Description
[0001] [0002] technical field [0003] The present invention relates to a method for treating cyanide-containing wastewater of a gold smelter, that is, a method for treating cyanide-containing wastewater of a gold concentrate roasting and smelter. Background technique [0004] In the prior art, the cyanide-containing wastewater of gold smelters mainly comes from the cyanidation process of gold concentrate, and the cyanide-containing solution is recycled during the production process. When the impurity components reach a certain level, a small amount of sewage needs to be discharged for treatment. . The discharged cyanide-containing sewage contains a relatively high cyanide content, generally above 200 mg / L, up to 2000 mg / L, and also contains a certain amount of heavy metal ions such as copper, zinc, and lead. In order to meet the discharge standards, many manufacturers have invested a lot of money in the construction of treatment systems, and the treatment costs are a...
Claims
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IPC IPC(8): F23G7/04
Inventor 林向东张国金
Owner 林向东